The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 27, 2010
Filed:
Jun. 22, 2006
Atul K. Gupta, Milton, CA;
Wesley C. D'haene, Burlington, CA;
Rajiv K. Shukla, Burlington, CA;
Gennum Corporation, , CA;
Abstract
Linear sample and hold phase detectors are disclosed herein. An example phase detector is coupled to an input data signal and a recovered clock signal and includes a linear phase difference generator circuit and a sample and hold circuit. The linear phase difference generator includes a first input coupled to the input data signal and a second input coupled to the recovered clock signal and outputs a first phase difference signal indicative of the phase difference between the input data signal and the recovered clock signal relative to a rising edge of the input data signal and a second phase difference signal indicative of the phase difference between the input data signal and the recovered clock signal relative to a falling edge of the input data signal. The sample and hold circuit is coupled to the first and second phase difference output signals and samples the voltage levels thereof in response to a first transition of the input data signal and holds the sampled voltage levels until a second transition of the input data signal. Novel clocking circuits using the linear sample and hold phase detector, as well as other types of linear phase detectors, are also disclosed herein in which a gain block non-linearizes the linear phase difference information output from the linear phase detector circuits.